Abstract
Objective
To investigate whether “follow-up and surgical resection after interval growth” can negatively influence recurrence or mortality in patients with persistent part-solid nodules (PSNs) with solid components ≤5 mm.
Methods
One hundred twenty five surgically resected persistent PSNs with solid components ≤5 mm in 125 individuals were evaluated. Of the 125 PSNs, 54 and 71 PSNs were categorized into interval growth and immediate surgery groups, respectively. Cox regression analysis was performed to evaluate the association of “follow-up until interval growth” with recurrence and survival, adjusted for initial clinical and CT features.
Results
In the interval growth group, 30 patients showed increased nodule size, 10 increased solid parts, and the remaining 14 both patterns. Five patients showed clinical stage shifts (stage T1a, initially, to T1b after interval growth). Post-operative disease recurrence occurred in six individuals (interval growth group, n = 2/54; immediate surgery group, n = 4/71), and four individuals died (interval growth group, n = 1/54; immediate surgery group, n = 3/71). There were no significant differences between these two groups in terms of recurrence-free survival (p = 0.451) and overall survival (p = 0.185).
Conclusion
“Follow-up and surgical resection after interval growth” did not negatively influence the prognosis of patients with persistent PSNs with solid components ≤5 mm.
Key Points
• Incidences of post-operative recurrence or death in patients with PSN are low.
• “Follow-up until interval growth” of PSNs does not negatively influence disease recurrence.
• There was no survival disadvantage related with “follow-up until interval growth” in PSNs.
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Abbreviations
- GGN:
-
Ground-glass nodule
- PSN:
-
Part-solid nodule
- AIS:
-
Adenocarcinoma-in-situ
- MIA:
-
Minimally-invasive adenocarcinoma
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Acknowledgement
The scientific guarantor of this publication is Prof. Dr. Chang Min Park. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. This study has received funding from the Research of the Korean Foundation for Cancer Research (grant number: CB-2011-02-01).
We appreciate statistical consultation by the Medical Research Collaborating Center at Seoul National University College of Medicine/Seoul National University Hospital.
Institutional Review Board approval was obtained. Requirement of written informed consent was waived by the Institutional Review Board.
Some study subjects or cohorts have been previously reported in [21, 22].
Methodology: retrospective, diagnostic or prognostic study, performed at one institution.
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Lee, J.H., Park, C.M., Kim, H. et al. Persistent part-solid nodules with solid part of 5 mm or smaller: Can the ‘follow-up and surgical resection after interval growth’ policy have a negative effect on patient prognosis?. Eur Radiol 27, 195–202 (2017). https://doi.org/10.1007/s00330-016-4364-9
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DOI: https://doi.org/10.1007/s00330-016-4364-9